SpaceX will launch Starship for a seventh test flight on Thursday, after weather concerns pushed back an experiment that will feature the spacecraft’s first payload deployment test, in what may be the latest milestone for the Elon Musk-owned aerospace company as it develops reusable rockets.

SpaceX’s Falcon Heavy launch in 2018 caused 4,645 minutes, or more than 77 hours, of commercial flight delays.

Qantas Airways Ltd. has been forced to delay some flights between Australia and South Africa in recent weeks following a warning from the US government about SpaceX rocket debris reentering the Earth’s atmosphere over the Southern Indian Ocean.